7 Works

Data from: Molecular and morphological diversity of on-farm hazelnut (Corylus avellana L.) landraces from southern Europe and their role in the origin and diffusion of cultivated germplasm

P. Boccacci, M. Aramini, N. Valentini, L. Bacchetta, M. Rovira, P. Drogoudi, A. P. Silva, A. Solar, F. Calizzano, V. Erdoğan, V. Cristofori, L. F. Ciarmiello, C. Contessa, J. J. Ferreira, F. P. Marra & R. Botta
Hazelnut (Corylus avellana L.) is a traditional nut crop in southern Europe. Germplasm exploration conducted on-farm in five countries (Portugal, Spain, Italy, Slovenia, and Greece) identified 77 landraces. The present work describes phenotypic variation in nut and husk traits and investigates genetic relationships using 10 simple sequence repeat (SSR) markers among these landraces, 57 well-known references cultivars, and 19 wild accessions. Among the 77 landraces, 42 had unique fingerprints while 35 showed a SSR profile...

Data from: Stable isotope labeled n-alkanes to assess digesta passage kinetics through the digestive tract of ruminants

Daniel Warner, Luis M. M. Ferreira, Michel J. H. Breuer, Jan Dijkstra & Wilbert F. Pellikaan
We describe the use of carbon stable isotope (13C) labeled n-alkanes as a potential internal tracer to assess passage kinetics of ingested nutrients in ruminants. Plant cuticular n-alkanes originating from intrinsically 13C labeled ryegrass plants were pulse dosed intraruminally in four rumen-cannulated lactating dairy cows receiving four contrasting ryegrass silage treatments that differed in nitrogen fertilization level (45 or 90 kg nitrogen ha−1) and maturity (early or late). Passage kinetics through the gastrointestinal tract were...

Data from: Endemic species may have complex histories: within-refugium phylogeography of an endangered Iberian vole

Soraia Barbosa, Joana Paupério, Jeremy S. Herman, Clara M. Ferreira, Ricardo Pita, Hélia M. Vale-Gonçalves, João A. Cabral, José A. Garrido-García, Ramón C. Soriguer, Pedro Beja, António Mira, Paulo C. Alves & Jeremy B. Searle
Glacial refugia protected and promoted biodiversity during the Pleistocene, not only at a broader scale, but also for many endemics that contracted and expanded their ranges within refugial areas. Understanding the evolutionary history of refugial endemics is especially important in the case of endangered species to recognise the origins of their genetic structure and thus produce better informed conservation practices. The Iberian Peninsula is an important European glacial refugium, rich in endemics of conservation concern,...

Data from: Extreme genetic structure in a social bird species despite high dispersal capacity

Francisco Morinha, José A. Dávila, Bastos Estela, João A. Cabral, Óscar Frías, José L. González, Paulo Travassos, Diogo Carvalho, Borja Milá & Guillermo Blanco
Social barriers have been shown to reduce gene flow and contribute to genetic structure among populations in species with high cognitive capacity and complex societies, such as cetaceans, apes and humans. In birds, high dispersal capacity is thought to prevent population divergence unless major geographic or habitat barriers induce isolation patterns by dispersal, colonization or adaptation limitation. We report that Iberian populations of the red-billed chough, a social, gregarious corvid with high dispersal capacity, show...

Data from: Developing allometric models to predict the individual aboveground biomass of shrubs worldwide

Georgina Conti, Lucas D. Gorné, Sebastian R. Zeballos, María L. Lipoma, Gabriel Gatica, Esteban Kowaljow, Juan I. Whitworth Hulse, Aníbal Cuchietti, María Poca, Sofía Pestoni & Paulo M. Fernandes
Aim Existing global models to predict standing woody biomass are based on trees characterized by a single principal stem, well-developed in height. However, their use in open woodlands and shrublands, characterized by multistemmed species with substantial crown development, generates a high level of uncertainty in biomass estimates. This limitation led us to i) develop global predictive models of shrub individual aboveground biomass based on simple allometric variables; ii) to compare the fit of these models...

Data from: Revisiting niche fundamentals with Tukey depth

Jorge Orestes Cerdeira, Tiago Monteiro-Henriques, Maria João Martins, Pedro C. Silva, Diogo Alagador, Aldina M. A. Franco, Manuel L. Campagnolo, Pedro Arsénio, Francisca C. Aguiar & Mar Cabeza
The first attempts to describe species ecological niches were simple geometric procedures that depict the niche boundaries directly from environmental data. The convex hull was one of such procedures, popular for its simplicity, clear ecological rational and precise definition of the niche. However, it lacked the ability to differentiate areas of the niche with different probabilities of occurrence according to environmental suitability. We incorporate the Tukey depth, a mathematical tool to measure the centrality of...

Following Darwin’s footsteps: Evaluating the impact of an activity designed for elementary school students to link historically important evolution key concepts on their understanding of natural selection

Xana Sá-Pinto, Alexandre Pinto, Joana Ribeiro, Inês Sarmento, Patrícia Pessoa, Leonor L. Rodrigues, Lucía Vázquez-Ben, Evangelia Mavrikaki & Joaquim Bernardino Lopes
While several researchers have suggested that evolution should be explored from the initial years of schooling, little information is available on effective resources to enhance elementary school students’ level of understanding of evolution by natural selection (LUENS). For the present study, we designed, implemented and evaluated an educational activity planned for fourth graders to explore concepts and conceptual fields that were historically important for the discovery of natural selection. Observation field notes and students’ productions...

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  • University of Trás-os-Montes and Alto Douro
  • University of Évora
  • National Museum
  • Estación Biológica de Doñana
  • University of Aveiro
  • Institute for Research and Technology in Food and Agriculture
  • Institute for Game and Wildlife Research
  • University of Lisbon
  • Ankara University
  • University of East Anglia